NAME

       bw_mmap_rd - time the reading and summing of a file

SYNOPSIS

       bw_mmap_rd [ -P <parallelism> ] [ -W <warmups> ] [ -N <repetitions> ] size file

DESCRIPTION

       bw_mmap_rd creates a memory mapping to the file and then reads the mapping in an unrolled loop similar to
       that used in bw_mem_rd(8).  The benchmark is intended to be used on a file that is in memory,  i.e.,  the
       benchmark is a reread benchmark.  Other file benchmarking can be done with lmdd(8).

       The  size  specification  may  end  with ``k'' or ``m'' to mean kilobytes (* 1024) or megabytes (* 1024 *
       1024).

OUTPUT

       Output format is "%0.2f %.2f\n", megabytes, megabytes_per_second, i.e.,

       8.00 25.33

MEMORY UTILIZATION

       This benchmark should move approximately the reported amount of memory.

ACKNOWLEDGEMENT

       Funding for the development of this tool was provided by Sun Microsystems Computer Corporation.

SEE ALSO

       lmbench(8).

AUTHOR

       Carl Staelin and Larry McVoy

       Comments, suggestions, and bug reports are always welcome.

(c)1994 Larry McVoy                                  $Date$                                        BW_MMAP_RD(8)